Auxiliary Decision-Making Study On Asphalt Pavement Maintenance Of Freeway

Since 1980s, the construction of freeways has developed rapidly. As a result of heavy traffic and the influence of climate and environment, the serviceability of freeway asphalt pavements has fallen year after year. The distresses such as cracking, rutting, sinkage appear on some section of freeways. So the fine pavement serviceability is the important guarantee of the speedy straightway and comfortable traveling. The maintenance of freeway plays a vital role in prolonging life of asphalt pavements.Firstly, the paper introduces service performance data type and investigation method of freeway. Then based on the survey data, service Performance Evaluation Model and Performance Predicting Model are constructed separately making use of mathematical programming and Markov analysis.Based on above study, Maintenance Decision-making model of freeway is presented. Decision-making model of freeway maintenance and management system is a mulitive objective problem which is subjected to a few qualitative and quantitative elements. In order to solve the problem, Network-level Decision-making Model and Project-level Decision-making Model are built separately basing goal programming principal and improved superior-inferior coefficient method principal.Besides, the paper gives the method to optimize maintenance decision making fund allocation, and Net Present Value and Internal Rate of Return are chosen as evaluation factors to illustrate the fund allocation under different circumstances.